WHICH IS BETTER FOR

PACKAGING and PRESERVING?

1. 
   
2. ALUMINIUM

A type of metal, usually the colours of silver. It has the symbol Al, and its atomic number is 13
- Advantages

1.Provide excellent barrier properties (gases, water vapour, light, odours)
2.Can be used in on-line filing pro
3.Strength
4.Can be heat treated, suitable for sterile products, can be hermetically sealed
-Disadvantages:

• Once in storage cans must be protected from moisture and/or humidity
• Health risk to the public
• Environmental disadvantages

If you would like more information, please Copy and Paste Links into url...

http://www.ucc.ie/fcis/PKtinplateandaluminiumcans.htm
http://www.azom.com/article.aspx?ArticleID=1396#_Advantages_of_Aluminium
http://www.livestrong.com/article/259503-the-disadvantages-of-aluminum-cans/

2. PLASTIC
A plastic material is any of a wide range of synthetic or semi-synthetic organic solids that are moldable. Plastics are typically organic
polymers of high molecular mass, but they often contain other substances. Usual colours are clear. Also known as Polyethylene Terephthalate (PET)

- Advantages

• Clear, flexible and strong
• Can be used for many other purpose other than packaging food, others as window cleaners and hand washes.
• Durability to last longer and doesn't have any bacteria growing on it

-Disadvantages

• Not environmentally friendly
• Not recycled easily due to durability

Want more information, Copy and Paste links below into url...
http://www.ehow.com/list_6081529_disadvantages-plastic-packaging.html
http://www.youtube.com/watch?v=yuRK3vnAuYo
http://en.wikipedia.org/wiki/Polyethylene_terephthalate


3. GLASS

A hard, brittle substance. Usually clear and is seen for everyday objects such as windows.

-Advantages

• No liquids or air can get in once sealed
• Recyclable
• Durability to last long

-Disadvantages

• Breaks easily when dropped or when other objects come in contact with enough force
• Expensive to produce
• Hazards come when packaging

Need more information? just copy these links into url...
http://designmeister.com/2009/09/18/plastic-versus-glass-in-food-packaging/
http://www.ucc.ie/fcis/PKglass.htm
http://www.bbc.co.uk/schools/gcsebitesize/design/foodtech/packaginglabellingrev2.shtml